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Why do I need a blood urea nitrogen (BUN) measurement?

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  1. Healthwise
     
    Healthwise answered:

    A blood urea nitrogen (BUN) test is done to:

    • See if your kidneys are working normally.
    • See if your kidney disease is getting worse.
    • See if treatment of your kidney disease is working.
    • Check for severe dehydration. Dehydration generally causes BUN levels to rise more than creatinine levels. This causes a high BUN-to-creatinine ratio. Kidney disease or blockage of the flow of urine from your kidney causes both BUN and creatinine levels to go up.
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    A blood urea nitrogen (BUN) test is done to: See if your kidneys are working normally. See if your kidney disease is getting worse. See if treatment of your kidney disease is working. Check for severe dehydration. Dehydration... More

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